Hypodermic syringe



May 6, 1930. F. c:` MONTUORI HYPODERMIC SYR INGE Filed Jan. l5, 1929:infill/1 Patented May 6, 1930 i I ,i v I UNITED STATES PATENT OFFICEAFELIX G. MONTUORI, E WASHINGTON, DISTRICT OIF COLUMBIA.

meneame sYnrNen Application led January 5, 1929. Serial No. 330,653.

The invention relates to hypodermic sythe rear extension 4 of theneedle, and a ringes, and my improvements are mainly dipistonV 5 adaptedto expel the medicinalconrected to simplifying the construction of thetents of the cartridge through the needle device with a saving in costof manufacture, and into the wound or puncture made by the 5 increasingthe conveniencel of manipulation needle. These parts are or may be ofknown 50 of the syringe in inserting and removing mecharacter and modeof operatlon. `The needicinal cartridges and the like, securely and dleis held in place by a removable nut or accurately holding the cartridgeopen to incap 6. 7 is a slide bearingat the rear end spection at alltimes while it 1s in place in of the barrel in which fits and operatesthe 10 the syringe. rod 8 of the piston 5. '9 is a handle fixed on 55With such objects .in view the invention the outer end of the pistonrod. The inner consists in the useful features, parts and end of thebarrel 1 is preferably formed with combinations thereof hereinafter setforth a retaining seat l() into which the innei` end and pointed out inthe Claims, of the cartridge, carpule or ampule 3 may In order to makethe invention more olearbe placed when it is entered into the barrel e0ly understood there are shown in the accomfor use through an opening 11in the side of panying drawings means for carrying the the barrel.

Same into practical eect, without limiting When the cartridge is pressedinto place the improvements, in their useful applica- 1t pressesoutwardly a side spring 12 and as tions, to the particular constructionswhich, the Cartridge bGCOlIlGS Central in the barrel 65 for the purposeof explanation, have been the Spring 12 Carries Outward a pin 13 fixedmade the subject of illustration. In the said O11 the Outer end of thespring and thereby drawings: e releases a movable retainer 14 for theouter Fig. 1 is a longitudinal section of a hypo- Gnd. 0f the cartridge,being so moved by a dermic syringe embodying my improve- Sprlng 15. 7e

' ments. on line L-I of Fig. 3, showing the When 1t is desired tolremove the cartridge cartridge in place in the syringe and the thehandle 9, rod 8 and piston 5 are drawn piston slightly entered into thecartridge, a. little outward, whereupon the pistonmoves Fig. 2 is asimilar section, showing the the retainer 14 away from the cartridge,

cartridge in the position which it primarily compressing the spring 15,and the side 75 takes either in being inserted into the syrspring 12immediately ejects the cartridge inge or in being ejected therefrom.through the `opening 11.

Fig. 3 is a bottom view of the barrel por- It will be understood thatthe cartridge is tion of the syringe. securely held in its centraloperative posi- Fig. 4 is a cross-section on line IV-IV of tion, in linebetween the needle and piston, 80 Fig. l. and while the piston makes itsinward move- Fig. 5 is a cross-section on line V-V of ment against orinto the outer end of the Fig. 1. cartridge, and during this time holdsand Referring to the drawings1 is the main stresses the side spring 12outwardly, and 40 body, central part or barrel of the syringe, when thepiston is withdrawn and the lre- 85l which is or may be a frame orhollow cylintainer 14 pulled outward to free the carder of suitablecharacter to receive a tubular fridge, the spring 12 is also releasedand needle 2 at its front end. a cartridge 3 in its ejects the cartridgeas aforesaid. intermediate part, the front end of which Opposite to theopening 11 the barrel may cartridge is ordinarily to be punctured by beformed with an opening 16, so that the 90 contents of the carpule may beviewed by the aid of light passing through the syringe from the oppositeside of the same to the eye.

What I claim is:

1. A hypodermic syringe having a barrel and means for holding a needle,said barrel having a loading opening in its side and constructed toreceive a cartridge, movable means for holding an end of the cartridge,and means automatically to eject the cartridge upon movement of saidmovable means.-

2. 'A hypodermic syringe having a barrel and means for holding a needle,said barrel having a loading opening in its side and constructed toreceive a cartridge. a cartridge retaining spring operating at the endof the cartridge, and a cartridge ejecting spring operatingautomatically at the side of the cartridge, upon action of saidretaining Spring.

3. A hypodermic syringe having a barrel and means for holding a needle,and a piston, said barrel having a loading opening in its side andconstructed to receive a cartridge, and means released by the cartridgeto hold the cartridge in position between the needle and the piston.

4. A hypodermic syringe having a barrel and means for holding a needle,and a piston, said barrel having a loading opening in its side andconstructed to receive a cartridge, means released by the cartridge tohold the cartridge in position between the needle and the piston, andmeans to retain said cartridge holding means in inoperative positionuntil released.

5. A hypodermic syringe having a barrel and means for holding a needle,said barrel having a loading opening in its side and constructed toreceive a cartridge, a cartridge retaining spring opearting at the endof thel cartridge, and a control spring therefor operating at the sideof the cartridge, to retain said lirst spring against operation.

6. A hypodermic syringe having a barrel and means for holding a needle,and a piston, said barrel having a loading opening in its side andconstructed to receive a cartridge, a movable cartridge retainer andspring operating at the end of the cartridge, the piston having aconnection with the retainer, and a cartridge ejecting spring operatingautomatically at the side of the cartridge, and means operable by thelatter spring to eject the cartridge upon movement of said retainer.

7. A hypodermic syringe having in combnation a barrel, means for holdinga hollow needle at one end of the barrel, a piston mounted at the otherend of the barrel for operating at the end of a cartridge, said barrelhaving a sid e openingto receive acartridge, means for holding thecartridge in place between the needle and the piston, and means toautomatically eject the cartridge upon movement of the piston to itslimit of travel in one direction.

8. In a side-loading syringe having a cartridge, means for retainingsaid cartridge in place, means for ejecting said cartridge from saidsyringe, and means for setting said cartridge-retaining means intoreleasing position to be freed by the insertion of the cartridge.

9. In a syringe having a cartridge, movable means for retaining saidcartridge in place and means for ejecting said cartridge when saidretaining means is released, and means for setting saidcartridge-retaining means into releasing position to be set free by theinsertion of the cartridge to retain the latter.

10. In a side-loading syringe, movable means for retaining said load inplace and means for holding said retaining means in inoperativeposition, said holding means being constructed to release said retainingmeans upon loading of the syringe.

1l. In a side-loading syringe having a cartridge, means for retainingsaid cartridge in place, means for releasing said cartridge from saidsyringe, and meansfor setting said cartridge-retaining means into lockedinoperative position to be released by insertion of the cartridge.

12. In a syringe having a piston, means to position a cartridge forengagement by the piston, and means to eject the cartridge, said ejecting means being self-operative when the piston is pulled back toreload.

13. In a side-loading syringe having a piston, means to position andlock a cartridge for engagement by the piston, movable means actuated bythe loading cartridge to release said first means, whereby the cartridgewill be locked in position.

14. In a side-loading hypodermic syringe, the combination of a barrelhaving a side opening, means for holding a needle, and a piston at therespective ends of said barrel, a sliding retainer for the outer end ofthe cartridge mounted on the piston rod and engageable by the piston todisengage the retainer from the cartridge, a spring urging the retainerto engage the cartridge, a cartridge-ejecting spring and means operatedby the latter to hold the retainer disengaged and to release the same.

15. In a side-loading hypociermic syringe, the combiantion of a barrelhaving a side opening, means for holding a needle and a piston at therespective ends of said barrel, a movable retainer for the outer end ofthe cartridge engageable by the piston to disengage the retainer fromthe cartridge, a spring urging the retainer to engage the cartridge, acartridge-ejecting device and means operated by the latter to hold theretainer disengaged and to release the same.

16. A hypodermic syringe having a barrel and means for holding theneedle, Sai barrel having a loading opening in its side and constructedto receive a cartridge, e cartridge retaining spring operating at theenti of the cartridge, and a control spring operating at the side of thecartridge to eject said cartridge upon releasing movement of the' rretaining spring and effective to hold saidA retaining sp1-ing in aninoperative position.

In testimony whereof I affix my signature.

FELIX C. MONTUOR,

